// Copyright 2019 The LUCI Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package internal

import (
	"go.chromium.org/luci/server"
	"go.chromium.org/luci/server/auth"
	"go.chromium.org/luci/server/gaeemulation"
	"go.chromium.org/luci/server/gerritauth"
	"go.chromium.org/luci/server/limiter"
	"go.chromium.org/luci/server/module"
	"go.chromium.org/luci/server/redisconn"
	"go.chromium.org/luci/server/secrets"
	"go.chromium.org/luci/server/span"
	"go.chromium.org/luci/server/tq"
)

// Main registers all dependencies and runs a service.
func Main(init func(srv *server.Server) error) {
	MainWithModules([]module.Module{}, init)
}

// MainWithModules is like Main, but accepts additional modules to register.
func MainWithModules(modules []module.Module, init func(srv *server.Server) error) {
	defaultModules := []module.Module{
		gaeemulation.NewModuleFromFlags(),
		gerritauth.NewModuleFromFlags(),
		limiter.NewModuleFromFlags(),
		redisconn.NewModuleFromFlags(),
		secrets.NewModuleFromFlags(),
		span.NewModuleFromFlags(),
		tq.NewModuleFromFlags(),
	}
	modules = append(modules, defaultModules...)
	server.Main(nil, modules, func(srv *server.Server) error {
		srv.PRPC.Authenticator = &auth.Authenticator{
			Methods: []auth.Method{
				// The default method used by majority of clients.
				&auth.GoogleOAuth2Method{
					Scopes: []string{"https://www.googleapis.com/auth/userinfo.email"},
				},
				// For authenticating calls from Gerrit plugins.
				&gerritauth.Method,
			},
		}
		return init(srv)
	})
}
